@article{duan_kovner_skokov_2022, title={CGC for ultra-peripheral Pb plus Pb collisions at the Large Hadron Collider: a more realistic calculation}, volume={12}, ISSN={["1029-8479"]}, DOI={10.1007/JHEP12(2022)077}, abstractNote={Abstract
                     We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of the nearly real photon, we consider two diametrically different models: the dilute quark-antiquark dipole approximation and a vector meson, in which color charge density is approximated by McLerran-Venugopalan model. In the experimentally relevant range, the target nucleus can be faithfully approximated by a highly saturated state. This simplification enables us to perform efficient numerical simulations and extract the two-gluon correlation functions and the associated azimuthal harmonics.}, number={12}, journal={JOURNAL OF HIGH ENERGY PHYSICS}, author={Duan, Haowu and Kovner, Alexander and Skokov, Vladimir V.}, year={2022}, month={Dec} }
 @article{duan_kovner_skokov_2022, title={Gluon quasiparticles and the CGC density matrix}, volume={105}, ISSN={["2470-0029"]}, DOI={10.1103/PhysRevD.105.056009}, abstractNote={Abstract We revisit and extend the calculation of the density matrix and entanglement entropy of a Color Glass Condensate by including the leading saturation corrections in the calculation. We show that the density matrix is diagonal in the quasi particle basis, where it has the Boltzmann form. The quasi particles in a wide interval of momenta behave as massless two-dimensional bosons with the temperature proportional to the typical semi-hard scale T = Qs/ √ αsNc. Thus the semi-hard momentum region Qs < k < Qs/ √ αsNc arises as a well-defined intermediate regime between the perturbatively hard momenta and the nonperturbative soft momenta k < Qs in the CGC description of a hadronic wave function.}, number={5}, journal={PHYSICAL REVIEW D}, author={Duan, Haowu and Kovner, Alex and Skokov, Vladimir V.}, year={2022}, month={Mar} }